Vertex.h revision 6d29c8d5218cac0fb35f3b7c253f2bdebd44f15a 
1/*
2 * Copyright (C) 2010 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 *      http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17#ifndef ANDROID_HWUI_VERTEX_H
18#define ANDROID_HWUI_VERTEX_H
19
20#include "Vector.h"
21
22namespace android {
23namespace uirenderer {
24
25/**
26 * Simple structure to describe a vertex with a position and a texture.
27 */
28struct Vertex {
29    float position[2];
30
31    static inline void set(Vertex* vertex, float x, float y) {
32        vertex[0].position[0] = x;
33        vertex[0].position[1] = y;
34    }
35
36    static inline void set(Vertex* vertex, vec2 val) {
37        set(vertex, val.x, val.y);
38    }
39
40    static inline void copyWithOffset(Vertex* vertex, const Vertex& src, float x, float y) {
41        set(vertex, src.position[0] + x, src.position[1] + y);
42    }
43
44}; // struct Vertex
45
46/**
47 * Simple structure to describe a vertex with a position and texture UV.
48 */
49struct TextureVertex {
50    float position[2];
51    float texture[2];
52
53    static inline void set(TextureVertex* vertex, float x, float y, float u, float v) {
54        vertex[0].position[0] = x;
55        vertex[0].position[1] = y;
56        vertex[0].texture[0] = u;
57        vertex[0].texture[1] = v;
58    }
59
60    static inline void setUV(TextureVertex* vertex, float u, float v) {
61        vertex[0].texture[0] = u;
62        vertex[0].texture[1] = v;
63    }
64}; // struct TextureVertex
65
66/**
67 * Simple structure to describe a vertex with a position, texture UV and ARGB color.
68 */
69struct ColorTextureVertex : TextureVertex {
70    float color[4];
71
72    static inline void set(ColorTextureVertex* vertex, float x, float y,
73            float u, float v, int color) {
74        TextureVertex::set(vertex, x, y, u, v);
75
76        const float a = ((color >> 24) & 0xff) / 255.0f;
77        vertex[0].color[0] = a * ((color >> 16) & 0xff) / 255.0f;
78        vertex[0].color[1] = a * ((color >>  8) & 0xff) / 255.0f;
79        vertex[0].color[2] = a * ((color      ) & 0xff) / 255.0f;
80        vertex[0].color[3] = a;
81    }
82}; // struct ColorTextureVertex
83
84/**
85 * Simple structure to describe a vertex with a position and an alpha value.
86 */
87struct AlphaVertex : Vertex {
88    float alpha;
89
90    static inline void set(AlphaVertex* vertex, float x, float y, float alpha) {
91        Vertex::set(vertex, x, y);
92        vertex[0].alpha = alpha;
93    }
94
95    static inline void copyWithOffset(AlphaVertex* vertex, const AlphaVertex& src,
96            float x, float y) {
97        Vertex::set(vertex, src.position[0] + x, src.position[1] + y);
98        vertex[0].alpha = src.alpha;
99    }
100
101    static inline void setColor(AlphaVertex* vertex, float alpha) {
102        vertex[0].alpha = alpha;
103    }
104}; // struct AlphaVertex
105
106}; // namespace uirenderer
107}; // namespace android
108
109#endif // ANDROID_HWUI_VERTEX_H
110